[class^=fui-] {
  box-sizing: border-box;
  &::after,
  &::before {
    box-sizing: border-box;
  }
}
button {
  box-sizing: border-box;
  height: 32px;
  margin: 0 4px;
  border-radius: 4px;
  &:first-child {
    margin-left: 0;
  }
  &:last-child {
    margin-right: 0;
  }
}